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GeneralRe: FFMPEG encrypt & decrypt Video offline Pin
DARA ALAVI13-Jul-20 22:09
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GeneralRe: FFMPEG encrypt & decrypt Video offline Pin
Victor Nijegorodov13-Jul-20 22:23
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GeneralRe: FFMPEG encrypt & decrypt Video offline Pin
DARA ALAVI13-Jul-20 22:38
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QuestionDoes FreeRTOS have built-in support for queues that can hold variable sized elements? Pin
arnold_w12-Jul-20 10:06
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AnswerRe: Does FreeRTOS have built-in support for queues that can hold variable sized elements? Pin
Richard MacCutchan12-Jul-20 21:14
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AnswerRe: Does FreeRTOS have built-in support for queues that can hold variable sized elements? Pin
leon de boer21-Jul-20 19:32
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QuestionWhat's the closest thing to anonymous function pointers I can achieve that compiles with GCC? Pin
arnold_w10-Jul-20 1:28
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AnswerRe: What's the closest thing to anonymous function pointers I can achieve that compiles with GCC? Pin
Josh Gray210-Jul-20 3:30
MemberJosh Gray210-Jul-20 3:30 
the
readDataResultCallback
member of your structure is just a fancy pointer, either 32 or 64 bits long depending on your architecture, so it can only be initialised with the memory address of a function.

So you could have something like the following...

void OnState1(uint8_t* readData, uint16_t sizeOfReadData) 
{
...
}

stateMachineStep_s stateMachineSteps[3] = {
{STATE1,    10, 2, &OnState1} 
...
}


which, to be honest, is not significantly more typing. You could also use macros to generate some of the code but that comes with it's own issues.

C++11 and greater support lambda expressions which will allow you to initialise your structs with a similar syntax to your example but in that case you would have to swap your function pointer to an std::function<> type. If you don't have c++11 support the boost library offers a similar function pointer but without the nicer lambda syntax.

modified 10-Jul-20 10:24am.

GeneralRe: What's the closest thing to anonymous function pointers I can achieve that compiles with GCC? Pin
arnold_w10-Jul-20 11:19
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GeneralRe: What's the closest thing to anonymous function pointers I can achieve that compiles with GCC? Pin
k505410-Jul-20 11:52
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GeneralRe: What's the closest thing to anonymous function pointers I can achieve that compiles with GCC? Pin
Richard MacCutchan10-Jul-20 22:05
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AnswerRe: What's the closest thing to anonymous function pointers I can achieve that compiles with GCC? Pin
CPallini12-Jul-20 20:33
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GeneralRe: What's the closest thing to anonymous function pointers I can achieve that compiles with GCC? Pin
arnold_w12-Jul-20 23:52
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GeneralRe: What's the closest thing to anonymous function pointers I can achieve that compiles with GCC? Pin
Richard MacCutchan13-Jul-20 2:00
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GeneralRe: What's the closest thing to anonymous function pointers I can achieve that compiles with GCC? Pin
arnold_w13-Jul-20 3:53
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GeneralRe: What's the closest thing to anonymous function pointers I can achieve that compiles with GCC? Pin
Richard MacCutchan13-Jul-20 4:29
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GeneralRe: What's the closest thing to anonymous function pointers I can achieve that compiles with GCC? Pin
arnold_w4-Aug-20 5:21
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Questionuse argv while debugging Pin
chipp_zanuff4-Jul-20 20:08
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AnswerRe: use argv while debugging Pin
Richard MacCutchan4-Jul-20 21:09
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GeneralRe: use argv while debugging Pin
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GeneralRe: use argv while debugging Pin
Richard MacCutchan4-Jul-20 22:19
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GeneralRe: use argv while debugging Pin
chipp_zanuff4-Jul-20 23:15
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GeneralRe: use argv while debugging Pin
Richard MacCutchan5-Jul-20 0:11
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GeneralRe: use argv while debugging Pin
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